Method of forming connections



Jan. 21, 1930. M. G. BAKER IETHOD OF FORMING CONNECTIONS Original Filed Nov. 7. 1927 Patented Jan. 21, 1930 MELVIN G. BAKER, OF CHICAGO, ILLINOIS,

A SSIGNOR TO CHICAGO FORGING &; MANU- FACTURING COMPANY", OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS METHOD OF FORMING CONNECTIONS Original application filed November 7, 1927, Serial No. 231,478. Divided and this application filed May 31,

1928. Serial My invention relates to a method of connecting metal objects and has for one purpose the provision of a method for joining handles and tubes which is particularly applicable to the manufacture of hood latches. The present application is a division of my co pending application N o.' 231,478, filed on November 7, 1927. Other objects will appear from time to time in th courseof the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying dranings, wherein- Figure 1 is a vertical section through an automobile hood showing my hood "latch in locking position; y

L Figure 2 is a plan view of the structure shown in Fig. 1; i p

Figure 3 is a vertical section through the latch stem and handle and head before being assembled; 3

Figure 4 is a section on the line 44 of Figure 3;

Figure 5 is a vertical section similar to Fig ure 3 showing parts assembled;

Figure 6 is a section on the line 6-6 of Figure 5- Figure 7 is a front elevation of the upper portion of the sleeve "Figure 8 is a side elevation of the sleeve;

Figure 9 is a section on'the line 99 of Figure7; v v

Figure 10 is a side elevation of the handle partly in section; a

Figure'll is a vertical form;

Figure 12 is a view similar to Figure 10, of a variant form;

Figure 13 is a section on the line 1313 of Fi ure 12; and

igure 14 is a section on the line 14-14 ofFigure 12. I I

Like parts are indicated by like symbols throughout the specification and drawings.

A is a portion of an automobile frame, to which may be secured 'an upstanding rib or section of a variant abutment member A against which abuts the lower edge B of the hood B when the hood is closed. Fastened to the hood B is a member generally designated as B which includes a downwardly and outwardly inclined cam portion B upwardly and outwardly inclined prongs B separated, for example, by the notch B a central portion B which is secured to the hood, B, and a downwardly and inwardly turned bottom portion B B are any suitable securing members.

C is any suitable shaft or pin terminating at the bottom in the square btveled head C C generally indicates a base member having a frame engaging securing portion 0 through which may pass any suitable securing member C and the intermediate raised portion formed by the upwardly and inwardly inclined top portion C and the generally vertical side walls C C is a concave, generally spherical flange surrounding the aperture C through which passes the pin 0..

The latch body proper consists of the cylindrical member D, herein shown as rolled from a single blank and with the single axial seam D The bottom of the cylinder may be formed in any suitable manner to retain the abutment below described. I illustrate the cylinder as being inwardly crimped as at D to secure the washer l) which is loose on the shaft 0. D is a washer secured to the upper end of the pin 0 and D indicates a coil spring compressed between the two washers.

The tendency of such spring is therefore to draw the cylinder D downwardly along the stem C.

- The cylindrical member or seamed tube D is formed with indentations or apertures. in its upper portion. vI illustrate the horizon tal notches or apertures E E situated a slight distance from the top of the tube. The'tube may, if desired, be formed with the inwardly turned flanges E It will be realized that the top of the tube may be formed in a variety *ofdifferent ways, it being essential that some G to receive the upper end of the tube D. Prior to the assembly and completion of the latch the portion G is provided withoutwardly projecting lugs or extensions of mate-- rial overlying or aligned with'the apertures E E 4 -In'assemblingthe latch any suitable arbor GT may be introduced within the tube and when the handle member G is in position the lugs or'extensions Gr are placed between 10 squeez ng jaws G and are subjected to pressure suficient to flow the metal of the handle into the opposed indentations or apertures of the tube. The result is a peculiarly complete and permanent attachment of handle to tube, the connection being only severable by the destruction of the handle member or the collapse of the tube. The collapse of the tube is particularly diflicult, and in practice is not likely to take place,'since the end' of the. tube is both protected and reinforced by the sturdy surrounding portion G of the handle. G indicates any suitable lugs or lug member opposed to the cam B on the hood.

In the o ration of the latch it will be understod t at when the T lug is between the members B in the notch 13, the outward movement of the latch away from the hood 1s cylinder D. downwardly along the in C t e lugs G" are opposed to the cam and to the downward locking movement of'the latch is added the resultant lateral thrust against the hood. 1

In Figure 11 I have shown the cylinder D having'the Figures 12 to 14 indicate a variation-of y method in which I omit the projection G as shown in Figure 3 and 10 and thus leave indentation in the exterior of the-finally finished member G indicated as G in Figures 12, 13 and 14. a

In parti iilar it will be realized that where in the claims I emplo the term aperture. I wish to understoo as meaning not merely an aperture comple'tel but any indentation or 0 -setting of the tube or the tube surface which will provide-an equivalfit' space into which the metal of the handlemay flow. ,"wli'ereas I have illustrated means for forcingcold'inetal into the indentations or aper- -tures of the member'D it will be realized that 'I may obtain an equivalent resultby positioning the tube B in a mold and pouring hot metal about it, thereby causing the metal 'to flow into the apertures and thus to form a permanent engagement with the tube eq1uivalent to that formed by the flowing of co d metal into the tube.

I claim: 1.- The method of forming a connection 'between a. tubular bodyand a surrounding metallic bod which includes forming an aperture int c end ofsaidtubular body, in-

serting said end within theinember to which prevented. As the spring D draws the indentationH, instead of slots.-

- through the. tube,

by forcing a portion of the metal thereof into said aperture and removing the arbor,

-andthereafter smoothing the outer surface of said surrounding member.

I 3. The method of forming a connection between a casting and a hollow tubing which includes providing in the casting an aperture conforming to the exterior surface of the hollow tube, aperturing the sides of the hollow tube, adjacent the end which is to penetrate the casting, inserting it within said casting and applying pressure to the exterior of sand casting to force the metal thereof intosuch aperture.

4, The method of forming a connection between. a casting and a hollow tubing which includes'providing in the casting an aperture conforming to the exterior surface of the" hollow tube, aperturing the sides of the hollow tube, adjacent the end which is to penetrate the casting, inserting it within said casting and applying pressure to the exterior of said casting to force the metal thereof 'into such aperture, while positioning an arbor within the tube to prevent its collapse during the application of pressure, and subse uently withdrawing the arbor.

igned at Sawyer, county of Sawyer and State of \Visconsimthis 21st day of May,

MELVIN G. BAKER. 

